Air conditioner



FIG. 1 is a perspective view of an air conditioner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the air conditioner and form no part of the claimed design. 

CLAIM The ornamental design for an air conditioner, as shown and described. 